Converting a Unipolar stepper to a bipolar

So why would you do this, well unipolar (5-8 wires) allow for more fine control, but have less torque to turn things.  Most 3D printers and CNC’s use bipolar too.  So…the convertion is pretty easy and you can get the motors from printers and other items that are junked.

http://hackaday.com/2014/07/29/changing-unipolar-steppers-to-bipolar/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+hackaday%2FLgoM+%28Hack+a+Day%29